Paul saith, 'Not of works, lest any man should boast.' Now, faith excludes all boasting. The hand which receives charity does not say, 'I am to be thanked for accepting the gift'; that would be absurd. When the hand conveys bread to the mouth it does not say to the body, 'Thank me; for I feed you.' It is a very simple thing that the hand does though a very necessary thing; and it never arrogates glory to itself for what it does. So God has selected faith to receive the unspeakable gift of His grace, because it cannot take to itself any credit, but must adore the gracious God who is the giver of all good.